List of Billboard 200 number-one albums of 1991 - Wikipedia
Billboard Top Hits: 1976 by Various Artists (CD, Apr-1991, Rhino (Label)) 81227067120 | eBay
Stepping Into The '90s: 1991 – Billboard Chart Rewind
30 Years Ago, The Billboard Hot 100 Singles Were Forever Changed By Broadcast Data Systems and SoundScan – Billboard Chart Rewind
Billboard Hot 100 Spotlight: November 23rd, 1991 – Billboard Chart Rewind
100 Greatest Albums from 1991 - Singersroom.com
1991 Music: The Best Musical Year of the '90s | Billboard – Billboard
Remembering September 24, 1991, the Day Underground Music Hit the Mainstream | Exclaim!
Chart Beat Podcast: 25 Years of Nielsen Music Data on the Billboard 200 | Billboard – Billboard
Top 10 Albums of 1991
Dave's Music Database: Billboard's Longest-Charting Albums
The 50 best albums from 1991 | Kerrang!
1991 SEPTEMBER 7 BILLBOARD MAGAZINE - HOT 100 CHARTS - ROCK POP MUSIC - PB 3140 | eBay
1991 Music: The Best Musical Year of the '90s | Billboard – Billboard
Top 10 Albums of 1991
Billboard Top Pop Hits - 1991 (Audio Clips) - YouTube
30 Years Ago, The Billboard Hot 100 Singles Were Forever Changed By Broadcast Data Systems and SoundScan – Billboard Chart Rewind
Should We Take Billboard's Older Charts with a Grain of Salt? (An analysis of three decades of Billboard chart history) : r/popheads
Billboard Top Hits: 1991 (2000, CD) - Discogs
25 Best Rock Albums of 1991
30 Years Ago, The Billboard Hot 100 Singles Were Forever Changed By Broadcast Data Systems and SoundScan – Billboard Chart Rewind
Top 10 Albums of 1991
No New Rock Albums Cracked Billboard's Year-End Top 200
